With the Giro Prolight Road Helmet, the operative word is "Pro." Wait...no...the operative word is "light." Well now you get to have it both ways. The culmination of an exhaustive ground-up design and engineering process - paying homage to Giro's original Prolight that set the standard for modern lightweight helmets in 1985 - Giro has once again re-defined what an ultra-lightweight helmet can be.

This helmet is a ridiculously lean 193 grams, and has pro features like Giro's Xstatic padding inserts for maximum comfort, 25 vents for maximum cooling, awesome graphics for maximum coolness, plus the Roc Loc SL elastic fitting system that keeps the helmet hugging your head comfortably all ride long. From time to time while out on the bike you may check your reflection in a window because quite simply this minimalist wonder gives the sensation of having nothing on your head at all.

Before buying the Pro Light helmet my neck would get sore and tired on longer rides. This is the lightest helmet on the market and WHAT A DIFFERENCE! The helmet fits well, is comfortable, and has proved itself TWICE in falls where my head hit the pavement at speed. I'm on my third Pro light helmet and I highly recommend.

I got this 2 days before leaving home to race an Ironman in Europe. My head measured exactly 23" (multiple measurements by several people) so i ordered the medium (up to 23.5"). It was too tight at a point on the back of my head and 2 points on the forehead. Using a razor blade, I was able to shave off a total of about 1/8" and then it fit perfectly. Felt like a custom molded fit for my head. Was so light, even after 4 hours I could barely notice it was on. Ventilation was great as well.

I've had excellent performance from several of these over the years and am sorry to hear Giro has discontinued this model. A number of reviewers point to the elastic strap in back and say the helmet is not adjustable. While it's true you can't adjust the strap itself, you can make the fit larger or smaller by moving the point where the rear band assembly attaches to the helmet. Simply pull the fitting that attaches the rear band assembly out of the hole into which it attaches and move it up or back to another hole. Admittedly, it's not as easy as turning a dial. You don't however, have that extra weight. Plus, the elastic strap is a great place to hang your sunglasses when you're riding in the shade or stopping for that latte.

I have ridden a long time and weight is normally not a primary concern, but after a bad spill a couple years ago I have problems with my neck on longer rides. This helmet does help because of the lower weight. True it is not as adjustable as most are but if you are like me then it is perfect. I own two and love them. If you are on the fence try one on first because not all helmets fit all head shapes.

The helmet is light weight but it has an elastic band instead of adjustment knob. I sent it back and bought a heavier helmet that has a way to adjust it in case you want to wear something underneath it. Weight is not everything.

Great service and sale price from Nashbar made this a deal I couldn't pass up!I wanted a helmet that didn't cause me neck discomfort on and after long rides.I do 3 or 4 rides a week of 2 or 3 hours or more and I don't know I'm wearing any helmet, at all. The fit was good right out of the box and the ventilation is excellent.Go for it!

My head size is well within Giros sizing chart for the medium helmet i bought. Unfortunately, the elastic bands squeezed my head to tight, hurting my forehead and leaving mark. I read the full instructions on how to adjust the helmet but their are few adjustments to this helmet. I was hoping the elastic would break-in a little and the forehead pain would go away but i decided to return the helmet when i realize i was not going to be unable to wear a winter or cycling cap under the helmet due to the size.